Last update at: 2024-04-30T13:30:00+01:00

**Please note that the last update time shown is rounded to the next market interval of 30 minutes

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Gas Storage: Historical Outages (https://www.ssehl.co.uk/HALO/)

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	Event Status			Type Of Unavailability			Type of Event
	Affected Asset or Unit			Affected Asset or Unit EIC Code

Affected Asset or Unit	Message ID	Event Status	Type Of Unavailability	Type Of Event	Publication Date/Time	Event Start	Event Stop	Unit of Measurement	Unavailable Capacity	Available Capacity	Technical Capacity	Reason Of Unavailability	Remarks	Balancing Zone	Affected Asset or Unit EIC Code	Market Participant	Market Participant Code
< 2 3 4 5 6 >
Aldbrough	ALD_000000000000000000670_002	Inactive	Planned	Injection unavailability	2022-05-31T17:01:53+01:00	2022-05-31T08:00:00+01:00	2022-05-31T16:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000670_001	Dismissed	Planned	Injection unavailability	2022-05-25T16:29:35+01:00	2022-05-31T08:00:00+01:00	2022-05-31T16:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000465_003	Inactive	Planned	Injection unavailability	2022-05-21T16:28:39+01:00	2022-05-08T05:00:00+01:00	2022-05-21T16:30:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000465_002	Dismissed	Planned	Injection unavailability	2021-10-06T22:32:34+01:00	2022-05-08T05:00:00+01:00	2022-05-21T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000465_001	Dismissed	Planned	Injection unavailability	2020-07-11T15:39:02+01:00	2022-05-08T05:00:00+01:00	2022-05-20T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000655_002	Inactive	Planned	Injection unavailability	2022-03-24T09:18:19+00:00	2022-03-24T05:00:00+00:00	2022-03-24T09:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	132KV Switchover	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000655_001	Dismissed	Planned	Injection unavailability	2022-03-16T14:46:23+00:00	2022-03-24T05:00:00+00:00	2022-03-24T09:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	132KV Switchover	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000653_002	Inactive	Unplanned	Injection unavailability	2022-03-07T08:23:38+00:00	2022-03-07T02:05:00+00:00	2022-03-07T08:15:00+00:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000653_001	Dismissed	Unplanned	Injection unavailability	2022-03-07T02:06:03+00:00	2022-03-07T02:05:00+00:00	2022-03-07T12:00:00+00:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000632_003	Inactive	Unplanned	Injection unavailability	2022-01-10T22:53:09+00:00	2022-01-10T06:30:00+00:00	2022-01-10T22:55:00+00:00	GWh/d	311.56	0	311.56	Failure	Power loss - full site/ Nitrogen unit failure caused by power loss	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000632_002	Dismissed	Unplanned	Injection unavailability	2022-01-10T11:19:13+00:00	2022-01-10T06:30:00+00:00	2022-01-12T18:00:00+00:00	GWh/d	311.56	0	311.56	Failure	Power loss - full site/ Nitrogen unit failure caused by power loss	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000632_001	Dismissed	Unplanned	Injection unavailability	2022-01-10T06:43:39+00:00	2022-01-10T06:30:00+00:00	2022-01-10T12:00:00+00:00	GWh/d	311.56	0	311.56	Failure	Power loss - full site	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000623_002	Inactive	Planned	Injection unavailability	2021-12-14T17:01:53+00:00	2021-12-14T08:00:00+00:00	2021-12-14T16:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	PCS Upgrade	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000623_001	Dismissed	Planned	Injection unavailability	2021-12-08T14:06:34+00:00	2021-12-14T08:00:00+00:00	2021-12-14T16:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	PCS Upgrade	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000607_003	Inactive	Unplanned	Injection unavailability	2021-09-11T22:01:50+01:00	2021-09-11T17:03:00+01:00	2021-09-11T22:00:00+01:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000607_002	Dismissed	Unplanned	Injection unavailability	2021-09-11T20:47:02+01:00	2021-09-11T17:03:00+01:00	2021-09-11T22:00:00+01:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000607_001	Dismissed	Unplanned	Injection unavailability	2021-09-11T17:06:21+01:00	2021-09-11T17:03:00+01:00	2021-09-11T21:00:00+01:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000602_003	Inactive	Unplanned	Injection unavailability	2021-08-09T18:08:25+01:00	2021-08-09T10:31:00+01:00	2021-08-09T18:08:00+01:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000602_002	Dismissed	Unplanned	Injection unavailability	2021-08-09T15:56:50+01:00	2021-08-09T10:31:00+01:00	2021-08-09T20:00:00+01:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000602_001	Dismissed	Unplanned	Injection unavailability	2021-08-09T10:42:12+01:00	2021-08-09T10:31:00+01:00	2021-08-09T16:00:00+01:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000458_004	Inactive	Planned	Injection unavailability	2021-05-16T17:52:10+01:00	2021-05-08T05:00:00+01:00	2021-05-16T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000458_003	Dismissed	Planned	Injection unavailability	2020-11-27T11:58:26+00:00	2021-05-08T05:00:00+01:00	2021-05-16T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000458_002	Dismissed	Planned	Injection unavailability	2020-07-11T13:43:50+01:00	2021-05-08T05:00:00+01:00	2021-05-20T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000458_001	Dismissed	Planned	Injection unavailability	2020-07-11T13:34:55+01:00	2021-05-08T05:00:00+01:00	2021-05-20T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000457_002	Dismissed	Planned	Injection unavailability	2020-07-11T13:31:39+01:00	2021-05-08T05:00:00+01:00	2021-05-20T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000763_005	Inactive	Unplanned	Withdrawal unavailability	2023-06-28T09:08:32+01:00	2023-06-06T09:45:00+01:00	2023-06-28T09:10:00+01:00	GWh/d	253.9	88.4	342.3	Failure	Reduction in max flow.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000763_004	Dismissed	Unplanned	Withdrawal unavailability	2023-06-22T11:32:01+01:00	2023-06-06T09:45:00+01:00	2023-06-28T18:00:00+01:00	GWh/d	253.9	88.4	342.3	Failure	Reduction in max flow.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000763_003	Dismissed	Unplanned	Withdrawal unavailability	2023-06-13T17:24:42+01:00	2023-06-06T09:45:00+01:00	2023-06-23T18:00:00+01:00	GWh/d	253.9	88.4	342.3	Failure	Reduction in max flow.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000565_002	Inactive	Planned	Withdrawal unavailability	2021-06-02T15:01:54+01:00	2021-06-02T09:00:00+01:00	2021-06-02T14:00:00+01:00	GWh/d	220.8	121.5	342.3	Planned Outage	For National Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000565_001	Dismissed	Planned	Withdrawal unavailability	2021-03-04T13:32:42+00:00	2021-06-02T09:00:00+01:00	2021-06-02T14:00:00+01:00	GWh/d	220.8	121.5	342.3	Planned Outage	For National Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000657_002	Inactive	Planned	Injection unavailability	2022-05-22T11:22:50+01:00	2022-05-21T18:00:00+01:00	2022-05-22T11:25:00+01:00	GWh/d	211.29	100.27	311.56	Planned Outage	GC-2 commissioning	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000657_001	Dismissed	Planned	Injection unavailability	2022-03-17T10:17:23+00:00	2022-05-21T18:00:00+01:00	2022-05-22T18:00:00+01:00	GWh/d	211.29	100.27	311.56	Planned Outage	GC-2 commissioning	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000763_002	Dismissed	Unplanned	Withdrawal unavailability	2023-06-06T21:44:48+01:00	2023-06-06T09:45:00+01:00	2023-06-23T18:00:00+01:00	GWh/d	187.17	155.13	342.3	Failure	Slight reduction in max flow.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000763_001	Dismissed	Unplanned	Withdrawal unavailability	2023-06-06T09:42:50+01:00	2023-06-06T09:45:00+01:00	2023-06-23T18:00:00+01:00	GWh/d	165.3	177	342.3	Failure	Slight reduction in max flow.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000888_004	Inactive	Unplanned	Withdrawal unavailability	2024-02-08T16:13:20+00:00	2024-02-08T01:41:00+00:00	2024-02-08T16:10:00+00:00	GWh/d	130	0	130	Failure	Dewpoint	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000888_003	Dismissed	Unplanned	Withdrawal unavailability	2024-02-08T07:28:23+00:00	2024-02-08T01:41:00+00:00	2024-02-08T18:00:00+00:00	GWh/d	130	0	130	Failure	Dewpoint	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000847_002	Inactive	Planned	Withdrawal unavailability	2023-11-27T13:59:01+00:00	2023-11-27T10:00:00+00:00	2023-11-27T13:58:00+00:00	GWh/d	130	0	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000847_001	Dismissed	Planned	Withdrawal unavailability	2023-11-23T09:34:15+00:00	2023-11-27T10:00:00+00:00	2023-11-27T14:00:00+00:00	GWh/d	130	0	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000850_003	Inactive	Unplanned	Withdrawal unavailability	2023-11-27T10:37:34+00:00	2023-11-27T00:10:00+00:00	2023-11-27T10:36:00+00:00	GWh/d	130	0	130	Failure	H2S	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000850_002	Dismissed	Unplanned	Withdrawal unavailability	2023-11-27T07:14:03+00:00	2023-11-27T00:10:00+00:00	2023-11-27T10:00:00+00:00	GWh/d	130	0	130	Failure	H2S	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000850_001	Dismissed	Unplanned	Withdrawal unavailability	2023-11-27T00:21:50+00:00	2023-11-27T00:10:00+00:00	2023-11-27T12:00:00+00:00	GWh/d	130	0	130	Failure	H2S	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000839_003	Inactive	Unplanned	Withdrawal unavailability	2023-11-09T14:25:28+00:00	2023-11-09T10:34:00+00:00	2023-11-09T14:25:00+00:00	GWh/d	130	0	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000839_002	Dismissed	Unplanned	Withdrawal unavailability	2023-11-09T13:23:48+00:00	2023-11-09T10:34:00+00:00	2023-11-09T14:30:00+00:00	GWh/d	130	0	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000839_001	Dismissed	Unplanned	Withdrawal unavailability	2023-11-09T10:35:13+00:00	2023-11-09T10:34:00+00:00	2023-11-09T13:00:00+00:00	GWh/d	130	0	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000837_002	Inactive	Unplanned	Withdrawal unavailability	2023-11-09T07:20:15+00:00	2023-11-09T05:05:00+00:00	2023-11-09T07:20:00+00:00	GWh/d	130	0	130	Failure	Fuel Gas	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000837_001	Dismissed	Unplanned	Withdrawal unavailability	2023-11-09T05:24:11+00:00	2023-11-09T05:05:00+00:00	2023-11-09T09:00:00+00:00	GWh/d	130	0	130	Failure	Fuel Gas	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000831_002	Inactive	Unplanned	Withdrawal unavailability	2023-10-29T15:24:04+00:00	2023-10-29T12:45:00+00:00	2023-10-29T15:22:00+00:00	GWh/d	130	0	130	Failure	Unavailable for withdrawal	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000831_001	Dismissed	Unplanned	Withdrawal unavailability	2023-10-29T12:55:02+00:00	2023-10-29T12:45:00+00:00	2023-10-29T18:00:00+00:00	GWh/d	130	0	130	Failure	Unavailable for withdrawal	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000826_001	Active	Planned	Withdrawal unavailability	2023-10-20T20:13:14+01:00	2024-06-28T05:00:00+01:00	2024-07-23T05:00:00+01:00	GWh/d	130	0	130	Planned Outage	Full site outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000498_003	Dismissed	Planned	Withdrawal unavailability	2023-10-20T17:25:46+01:00	2024-07-01T05:00:00+01:00	2024-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK

The information that is set out on these pages is provided pursuant to Regulation (EU) 1227/2011 and associated guidance. The provision, reading or use of the information neither establishes a contract nor creates a unilateral guarantee. Nor does the provision of information constitute the furnishing of investment advice, or an invitation to buy or sell goods, derivatives or (other) financial instruments. If any provisions of this disclaimer shall be unlawful, void or for any reason unenforceable then that provision shall be deemed severable and shall not affect the validity and enforceability of the remaining provisions. This disclaimer is given on the basis of English law and shall be subject to the exclusive jurisdictions of the English courts. Historical UMMs as previously published can be located within the public area of our website – https://www.ssehl.co.uk/HALO. An explanation of how we calculate our maximum technical capacities and how we measure is available from https://www.ssehl.co.uk/HALO.